This very amusing Dr Who story has the doctor and his companions pursed through time and space by the Daleks, determined to destroy the Doctor. They begin when the Doctor makes a machine than can show them anything in history, even a Beatles concert "I didn't know the Beatles played classical music" exclaims Vicky, which naturally makes Barbara and Ian feel very old.
The chase takes them to a variety of different settings, including a planet with an aquatic race who have run out of water, the top of the empire State Buidling, and the Marie Celeste. finally we learn why the marie Celeste was abandoned - the crew all jumped overboard because they were scared by Daleks. Then they find themselves in a strange carnival setting, where they meet Frankenstein, Dracula, etc, and finally a jungle planet with large carnivorous plants. One plant very gamely tries to eat a Dalek, but is exterminated. It probably didn't have a tin opener anyway.
At the end of this story, ian and Barbara finally make it back to 1960s earth. I love the scene where they are on a bus, and Ian asks the conductor for two threepennies. "Threepennies" says the conductor incredulously "where have you been, on the Moon?" "No, but you're getting near" Ian replies cheerfully.
I think this is a highly enjoyable Dr Who adventure, I enjoyed every moment of it.